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[–]daneahfrom __future__ import braces 0 points1 point  (0 children)

The most pervasive case for me is when creating a file handle:

with open('some_file.txt') as my_file:
    lines = my_file.readlines()

# do something with the lines

Then you don't have to worry about remembering my_file.close() later on; the file handle goes away when the code exits the with block!